2. 1.Mass
-is the amount of matter in an object. It
is usually expressed in grams (g) and
kilograms (kg). Different types of
balances are used to measure mass such
as an spring balance, platform balance,
among others.
3. 2. Weight
-is the pull of gravity on earth. The
full of gravity indicates force. The
unit to express weight is newton,
which is named after a great
physicist, Sir Isaac Newton.
4. 3. Volume
-is a measure of the space occupied
by an object. It is usually expressed
in units like cubic centimetre (cm ),
milliliter (mL), and liter (L).
3
5. a. Volume of a cube
-all sides (S) of a cube are equal in
length, so its volume is:
V= S x S x S
6. b. Volume of a rectangular solid
-there are dimensions involve in
measuring the volume of a rectangular
object: length (l), width (w), and height
(h) or thickness.
Formula: V= l x w x h
7. c. Volume of a cylindrical object
-there are two dimensions involved in
measuring its volume: height (h), and
radius (r).
Formula: V=πr h2
π= 3.14
r = r x r2
8. 4. Density
-it indicates if the object will float
or sink in water. It is also used to
compare two different objects in
terms of heaviness.
9. Formula: D= M , M=DV , V= M
V V
The unit for density will depend on
the units used for mass and volume.
10. 5. Temperature
-it refers to the hotness or coldness of
an object. It can be measured directly by
using thermometer. Measures of
temperature are expressed in different
units: degree Celsius (°C), degree
Fahrenheit (°F), and Kelvin (K).
11. Formulas:
1. °F to °C
°C = °F-32
1.8
2. °C to °F
°F = (°C x 1.8) + 32
3. °C to °K
K = °C + 273
